1 scope
This technology is applicable to industrial
and civil buildings of the ribbed floor slabs and roof installation and removal
of the shell.
2 construction preparation
2.1 materials and equipment:
2.1.1 plastic or fiberglass shell: plastic
mold with modified Polypropylene plastic for injection into the substrate.
Two-way ribbed slab m-shell, more current specification for 120cmx90cmx30~45cm
and 120cmx120cmx30~45cm, cross rib height 9cm, 1. 4cm, four assorted and
increase L36x3 around the shell angle in order to connect. One-way ribbed floor
slabs with t-shaped shell, currently used for more specifications
112cmx525cmx35~43cm.
Fiberglass Shell stiffness without steel
reinforcement, more use of specifications for 120cmx120cmx30cm, 150cmx150cmx40cm.
More shell geometry, surface quality and
mechanical properties, should meet the needs of national and industry standards
as well as design, and product certification.
2.l.2 support system:
2.l.2.1 WDJ Bowl or multifunction scaffold
or door-frame.
2.1.2.2 template ingredients: L50x5 7.5x10
angle iron, 10x10 wood, wood, nails, etc.
2.1.3 equipment: hammers, axes, saws,
drill, spirit level, crowbars, and so on.
2.2 operating conditions:
2.2.1 template and support system design:
according to the type of engineering structures and characteristics to
determine water partitioning; determine form layout, vertically and
horizontally arranged muleng specifications, quantity and size determine shell
connections to cimuleng and other structural elements. Also determine the
combinations of formwork support system. Check formwork and scaffold the
strength, rigidity and stability. Draws a full shell-mode and support system
design. Including general layout, paragraph layout, template layout template
and bracket Assembly diagram, a node detail drawing, parts diagrams.
2.2.2 pole (corner-tube), floor walls and
concrete strength of shear wall design or construction specifications further
strength.
2.2.3 floor axes, level elevation measured
on the walls, columns and go through preflight procedures.
3 shell templates installation process, (a
case study of support system of primary and secondary wood peg)
3.1 process:
Mounting bracket install primary and
secondary wood peg → adjust → ribbed girder floor elevations and arching form setting → → quality control
3.2 support system using WDJ
Bowl-multifunctional rack or frame groups into setting mode supports, lifting
composed and decomposed, one-piece steel pillars, steel (wood) frame, angle
steel composition support system, bulk roll. Determined by the design template,
and perform in the construction. Where a design height of more than 3.5M every
2m high angle fasteners and steel pillars, and connects to the structure
stable.
3.3 backwater after rough elevation,
install 10cmx10cm muleng, spacing is about 60~120cm. Installed in the main
wooden peg 7.5cmx10cm after cimuleng, its spacing is 40~60cm. Cimuleng
according to rib spacing OK. Cimuleng ∠ 50x5 installed on
both sides of the angle iron (preloaded). Before installing cimuleng in the
Lord on a wooden peg to release edge of the shell, the accurate location of the
release of ribbed wire to make cimuleng (the rib) axis position accuracy.
3.4 after the installation of wooden peg,
we must carefully adjust the jacking lift, cimuleng conforms to the design on
the top level (that is, ribbed bottom level comply with the design
requirements). Arch to design requirements. Design requirements, spring height
for the entire length of a 1/1000~3/1000.
3.5 Summary templates design layout, on
both sides of the shell is installed in cimuleng by model on the annealing. Add
top shell feet to ensure the bottom of the shell stiffness. Shell surface spray
water barrier. Node detail as shown in Figure 4-1. Unidirectional mode shell
length to connect lap length must not be less than 10cm, so as not to lack of
lateral stiffness at the interface. Bi-directional mode installation, from the
Center to the ends in a column grid emissions should not have the emissions
from one end to the other end to avoid rib range at both ends. Places where you
cannot use shell, shoe repair site.
Formwork installation node in Figure 4-1
Sketch map
3.6 Summary template-project evaluation
standard for quality check for form templates. Check the focus in shuttering
its stiffness guarantees and the tightness of connections. Go through the
preflight.
4 shell template removal process
4.1 operational processes:
Remove angle split → shell → remove
brackets
4.2 when Shell, concrete strength must be
up to 10MPa. Before annealing removed, then the shell with a small crowbar to
pry up the midpoint of the two sides, shell can be removed. Ribbed girder high,
shell is not easy to remove, using air stripping process.
Stripping not overexert, didn't throw to
pry, to gently to prevent damage.
4.3 remove bracket: concrete strength must
reach the required stripping strength, allows remove bracket.
4.3.1-group spelling setting mode support,
first level of connection mode for each unit supports levers and scissors
removed backwater on the cut, to match the rib off. Unit mode support is then
translated to the cantilevered platforms, lifting to a new job.
4.3.2 bulk remove holder, first remove the horizontal
rails, scissors, cut from both ends of the span to the pillar underpinning, and
ribbed bottom out, removed by Prop.
5 quality standards
5.1 project: floor and bracket must have
sufficient strength, rigidity and stability; the support part of the bracket
must have sufficient bearing area. If installed in on soil, soil must be solid
and drainage measures. On collapsible loess, must have a waterproof measures on
frost heaving, there must be measures to freeze-thaw.
Method: the control template design,
observation or a standard check.
5.2 Basic project:
5.2.1 template joint width cannot be
greater than 1.5mm.
Inspection method: observation and wedge
feeler Gage check.
5.2.2 template contact surface clean and
take quarantine measures. Beam on the template of mucilage and brush barrier
leakage area should be not more than 400cm2 new threat definitions.
Inspection method: observation and standard
checks.
Allowable deviation, as shown in table 4-5.
Tolerance (mm)
Single-layer, multi-layer frame
5 3 feet of beam axis displacement check
Beam section dimensions +4-5 + 2-5 ' check
Elevation ± 5 or cable and standard +2-5
level checking
Two adjacent surface height difference of 2
2 line or foot check
Surface roughness 5 5 2m m on foot and
feeler gauges check
Reserved plate centre line 3 3 foot check
Reserve tube, 3 reserved hole center line
displacement 3 ' check
6 product protection
6.1 in the high 1/2 level support systems
around the rail should be fixed on the first floor level safety net to prevent
people falling and dismantling formwork, which crashed into the safety nets to
protect the shell.
6.2 form removal using a small crowbar,
muleng as a fulcrum to pry the shell on both sides of the State median, mode
after loosening the shell, muleng fulcrum, pry bottom rib, gently pry out shell
down. Avoid hard to pry or hammer hard hit, nor use the crowbar to ribs of
concrete as a fulcrum to pry, to protecting the formwork and ribbed concrete.
6.3 when lifting shuttering, mugangleng, or
steel, no collision has installed Shell in case the template deformation.
6.4 to strictly follow the concrete
strength of up to 10MPa removable mold shell; concrete strength 7.5%, rib when
cross-<8m, removable pillars, but ribbed cross->8M, the strength of the
concrete must be pillars up to 100% can be removed.
7 should pay attention to quality issues
7.1 key rib beam side expansion out, beam
body not shun straight, beam end of uneven: control of method is, template
bracket system due enough of strength, and stiffness and stable; pillar end of
feet should pad pass long hand, and should support in solid of ground Shang;
die shell bottom and side should set level and side to support, to complement
die shell of stiffness; key rib Liang Dileng should by design and construction specification
up arch; support angle and cileng play flat line installation, and PIN solid
solid.
7.2 one-way ribbed bottom part down;
prevention methods is that shuttering the installation should be made by both
ways across the installation, to reduce errors of form of lap length. Carefully
adjust the lap length shell after installation so that it shall not be less
than 10cm to ensure rigidity at the interface.
7.3 ribbed beam axis displacement, at both
ends of ribs: method of prevention is, after the main cord install leveling,
and install the cord release cord to the sideline, and checked. Install cord
strictly in line, and connects to the main cord firmly.
7.4 mode installation does not close: this
is caused by mold machining tolerances. Check Shell to install gap, nail
plastic or rubber filling.
8 quality records
This standard shall meet the following
quality records:
Sub-item project technology gives the
low-down 8.1 template record.
8.2 template project pre-screening records.
8.3 quality assessment template project.
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